Can my dark lenses protect from UV light?

[eyeglasses frame]

I have a pair of sunglasses whose lenses are very dark. When I go out wearing with them, I do not feel the strong sunlight. Do I still need those "UV Protective" sunglasses?

[cheap glasses]

Yes! Most people believe that the darkness of the lens is what protects their eyes. The degree of darkness has no effect on UV rays. For adequate protection, you need to buy sunglasses that indicate they block 100 percent of the sun's UV rays.